﻿#region Copyright Notice
// 
// 
//  
//  Copyright (c) 2009-2011 Anindya Chatterjee
//  
//  Licensed under the Apache License, Version 2.0 (the "License");
//  you may not use this file except in compliance with the License.
//  You may obtain a copy of the License at
//  
//      http://www.apache.org/licenses/LICENSE-2.0
//  
//  Unless required by applicable law or agreed to in writing, software
//  distributed under the License is distributed on an "AS IS" BASIS,
//  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
//  See the License for the specific language governing permissions and
//  limitations under the License.
// 
// 
#endregion
using System;
using System.Reflection;

namespace AbstractClass.NPerf
{
    internal static class TypeHelper
    {
        public static bool HasCustomAttribute(this MethodInfo t, Type customAttributeType)
        {
            if (t == null)
                throw new ArgumentNullException("t");
            if (customAttributeType == null)
                throw new ArgumentNullException("customAttributeType");

            return t.GetCustomAttributes(customAttributeType, true).Length != 0;
        }

        public static Object GetFirstCustomAttribute(this MethodInfo mi, Type customAttributeType)
        {
            if (mi == null)
                throw new ArgumentNullException("mi");
            if (customAttributeType == null)
                throw new ArgumentNullException("customAttributeType");

            Object[] attrs = mi.GetCustomAttributes(customAttributeType, true);
            if (attrs.Length == 0)
                throw new ArgumentException(LanguageResource.TypeHelperGetFirstCustomAttribute);
            return attrs[0];
        }
    }
}